Saw-guide



(Model.)

J. P. HALL.

SAW GUIDE.

' Patented Feb. 28.1882.

UNTED STATES -PATENT OFFICE.

JOHN P. HALL, 0F BLUKFFTORINDIANA.

ySAW-GUIDE.

SPECIFICATION forming part of Letters Patent No. 254,212, dated'February 28, 1882.

Application tiled December 31, 1881.

To all whom it may concern Be it known that I,JOHNP. HALL, a citizen of the United States, residing at Bluton, in

inexpensive ,in construction, which can be readily applied to the saw-frame, and which can be conveniently adjusted to the saw by the attendant without requiring him to change his position, as more fully hereinafter specified.`

These objects I attain by the devices and mechanism illustrated in the accompanying drawings, in which- Figure l represents a top view of my improved guide complete; Fig. 2, afront elevation of the same; and Fig. 3, a longitudinal vertical vsectional View ot' the guide, taken on the line ac x ot' Fig. l.

The letter A indicates the base-plate of my improved guide, which is preferably constructed of cast metal, and is provided with transverse slots B, by means of which it may be adjustably secured to the saw-frame by means of suitable set-screws or otherwise. The -said plate A, on its upper face, is provided with a frustum-shaped boss, G, upon which is swiveled a bent lever, D, the said lever being conlined thereon by means of a central screw-bolt, E, the head of which sets in a countersunk recess in the lower side of the plate A, the upper end of said bolt being screw-threaded and provided with a confining-nut, F, a suitable washer, G, being interposed between the nut and the .lever D, and an elastic washer, H, being interposed between the washer G and the end of the boss G, by means of which the said lever is held with a yielding pressure to 'its seat upon the boss. The bent lever, at its free end., is bifurcated, as indicated by the letter I, and provided with an approximately circular opening, K, as shown in Fig. 1. The members of the bifurcated portion of the said lever (Model.)

are bored transversely, and are provided with adjusting-pins L, which are held in position by means of set-screws M.

To the inner side of the lever D is secured or cast with it a lug, O, which is bored vertically, and forms a bearing for a shortjournal, P, which carries a female screw-threaded nut, R, with which engages a male screw-thread formed on the end of an adjusting-shaft, T. The said shaft, near its free end, is provided with an annular groove, U, and is journaled in a vertically-slotted stud, W, secured to or cast with the frame A. The free end of said shaft terminates in a cross-head, Y, thumb-button, or other device, by means of which the shaft may be conveniently turned to adjust the lever to the saw.

The journal P is confined in its bearing in the present instance by means of a transverse spring-pin, Z, and the shaft T by means of a similar pin, A', but it is evident that other means may be employed for this purpose, it' desired.

The operation of myinvention will be readily understood in connection with the above description, and is as follows: The plate A is secured to and adjusted upon the saw-frame by means of suitable screws or bolts passing through the slotsB, the edge of the sawpassing between the bifurcated members of the bent lever D. The pins L are then properly adjusted to guide the saw. When the saw is in operation, should any further adjustment become necessary, this can be effected by simply turning the adjusting-shaft in the proper direction without stopping the saw or requiring the attendant to change his position.

The advantages of my invention will be apparent, as it will be seen that the device is constructed virtually of two parts, A and D, and the adjusting mechanism, making it compact, solid, and durable, and reducing its cost to a minimum, while it can be adjusted to guide the saw with the greatest nicety with but little trouble. Moreover, owing to the simplicity of its construction, it is not liable to get o'ut of order, and if it becomes impaired it can be readily repaired at small cost.

Having thus described my invention, what l claim, and desire to secure by Letters Patent,

IOO

1. The hase-plate A, having the lever D pivas shown, for connecting said lever lo the baseoted on a boss projecting therefrom, and havplate, substantially :is und for the purpose set ing at its bifureated end the lug O, in combiforth. y nation with the screW-nutR, connected thereto, In testimony that I claim the above I have 15 5 and the adjusting screwshaft T, substantially hereunto subscribed my name in the presence as and for the purpose set forth. of two witnesses.

2. The base'plute A cast with the frustumn shaped boss C, in combination with the lever JOHN PHILIX HALL D, constructed as described, and having screw- Witnesses 1o nut R,t0 operate in connection with the ad- LEVI MOCK,

justing screwshaft T, and means, substantially JACOB STOUT. 

